Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [inductive]

In the context of electronics, inductive refers to circuits that use magnetic fields, for things such as power or data transfer or sensing metal objects

1
vote
2answers
55 views

Fake energy saver inductive loads

I watched this video on YouTube, it covered fake energy saving devices. I have seen many of these fake devices and they all seem to use a capacitor. My question is why would they bother? The person ...
-1
votes
0answers
27 views

Possible to make an inductive charger that operates on the front of a phone? [closed]

My wife uses a bulky phone case that prevents inductive chargers from working. Would it be possible to manufacture a charging coil that had the opposite "polarity", so you could lay a phone face ...
0
votes
2answers
64 views

Conditioning input power supply on PCB

I have had issues in the past with using too close of an input power supply to the max rating of my main power regulator causing failures. For example, I used a 24VDC supply with a regulator with an ...
0
votes
2answers
35 views

P-Channel MOSFET reverse polarity protection on NMOS array chip

I'm trying to achieve reverse polarity protection for the TPL7404LADR chip which is basically an updated version of the ULN2003 darling transistor array. To do this I want to use a P Channel MOSFET ...
1
vote
1answer
23 views

Inducitve Proximity Sensor - Safety Gate Latch Codes?

If I am using an inductive proximity sensors as a safety gate latch, what codes and standards do I need to abide by? Some safety sensors I research have: - Category 3 (EN ISO 13849) - Safety ...
2
votes
2answers
55 views

Ideal LC circuit decays over time in LTspice

I was trying to simulate a transformer without a load, and setting an initial condition to observe how the energy will flow from the primary to the secondary circuit. I realized that the energy will ...
0
votes
0answers
39 views

Can a transformer damage a function generator?

I was playing around with a Siglent SDG 1032X and a small transformer, that I have directly connected to the generator's output, when I have reached the over voltage protection: I have accidentally ...
1
vote
1answer
93 views

ADC oscillation problem with inductive load

ADC in question is onboard ATMega168 micro controller. Relevant parts of the circuit look like this: simulate this circuit – Schematic created using CircuitLab Now I know AVCC is recommended ...
0
votes
1answer
42 views

PL-08N inductive sensor not turning off

I have one of these inductive sensors marked as PL-08N which should work within a 4-30VDC range and trigger at 8mm or less. I wired it as described below, with my ...
1
vote
2answers
108 views

Advice on choosing components for a flyback arrangement, for switching inductive loads fast

I have a bank of x6 MOSFETs (SUG90090E) connected in parallel, which I am using to switch a current of maximum 30A through a coil (resistance 1R and inductance 1mH), and am looking for some general ...
4
votes
2answers
86 views

What would happen if you accidentally casually put your apple watch on a wireless charger meant for phones or other higher power devices for hours? [closed]

What would happen if you accidentally, casually (because they're supposed to be so convenient!) put your apple watch on a wireless charger meant for phones or other higher power devices for hours? Or ...
0
votes
0answers
63 views

How to safely switch a big inductive load with a Triac using a capacitor snubber?

I am building a Spot Welder with a big powerful transformer. I have to switch a big inductive load of 70mH (input of a transformer) The switching will be done with an SSR (Opto Triac Zero crossing SSR-...
0
votes
1answer
55 views

WPT compensation topologies

I'm experimenting with compensation topologies for inductive WPT systems and have a small confusion. The general WPT industry uses compensation networks to cancel out reactive components in the ...
0
votes
3answers
112 views

Why does the voltage induced in the receiver coil of this WPT circuit decrease when a load is added (in parallel)?

The following is a circuit that wirelessly transfers power via inductive coupling. The circuit is supposed to power a 12 V 0.15 A DC fan and a typical smartphone, which requires 5 V DC across it. The ...
1
vote
1answer
78 views

What's causing the audible 7/8th rhythm in Qi chargers?

I have a wireless Qi charging system for my mobile phone. When I put the phone into the cradle it starts getting charged and I can hear a very quiet noise coming from the arrangement. Other ...
0
votes
1answer
33 views

Inductive loading in ADSL lines?

I have read that a significant drawback of telephone lines, one that makes difficult fast digital data transmission is the fact that they are inductively loaded. Now in telephone ADSL lines, are these ...
1
vote
2answers
189 views

IGBT destroyed. Help me identify any potential problems

I am trying to build an inductive oven control (for temperatures up to 1500 C), that controls the temperature by turning on the the inductive oven on and off like a commercial inductive hotplate. ...
0
votes
0answers
213 views

Minimal components for lighting an LED via wireless power transfer

I understand the basic concept of wireless power transfer. I wanted to make some wireless LEDs (Similar to this concept) and was trying to figure out the minimum component count I required in order ...
1
vote
1answer
32 views

How does electromagnetism factor into inductively coupled RFID systems

LF and HF RFID systems use inductive coupling to supply the tag with power. UHF RFID systems use antennas to send electromagnetic waves, the power supplied to the tag comes from the transmitted ...
0
votes
1answer
226 views

Controlling the Spark plug using 555 IC

I built the circuit for ignition system using MOSFET, 555, ignition coil(specs unknown. But current rating is more than 2 A and less than 10 A), SMPS(12 V, 10 A for powering the the whole circuit). ...
1
vote
2answers
251 views

Protecting a power supply from inductive load

I recently got a PeakTech 6225A power supply for my hobby of making/"tinkering"/messing around. I get many parts that I want power separately to diagnose them. I also get a lot of electromotors and ...
0
votes
1answer
41 views

How to spec out a relay correctly

I have a load that I am trying to switch with a relay. The load to the relay is an autotransformer. The wiper output of the autotransformer is (2) 120:30 step down transformers with each having 150W ...
1
vote
1answer
57 views

Inductive Charging 2 layer coil transfer to 1 layer receiver. Any issues?

I am looking to incorporate a inductive charging mechanism into a project I’m working on. On the receiving side I only have room for a single layer coil design. For my transfer side I have more ...
1
vote
2answers
189 views

Can every voltage source accept fly-back diode's current?

A diode is used parallel to the motor (or inductive load) in order to prevent damage to the switch because of back-emf voltage. Now, that back-emf voltage actually produces a current and by using a ...
1
vote
2answers
65 views

Inductive proximity sensor and target design

I am thinking of using the LDC1612 by TI to sense position over a 0 to 10mm range with an accuracy better than 100nm. I have been told this is possible by a TI engineer. However, my question concerns ...
1
vote
2answers
148 views

T.I H-Bridge design with No protection diodes?

I am still on my struggle trying to design my own Brushed DC H-bridge with all N-MOS, still in the research stage and burning mosfets left and right. I have come across this T.I design ,relatively ...
-3
votes
1answer
751 views

arduino controlled spark plug with ignition coil

I am trying to built a ignition system which will have the following Spark plug Ignition coil (I don't know the spec of these. but this one is from Honda Activa) Some switching circuit I found ...
1
vote
1answer
90 views

DC/DC step-down regulator destruction because of inductive load?

I was evaluating PAM2316 DC/DC step-down converter and destroyed several of them, I suppose the cause could be an inductive load. See my schematic and my layout here: Let me explain: The circuit was ...
2
votes
3answers
703 views

Npn transistor failed to work

Sometimes after long time working correctly and turning on and off inductive load, Darlington NPN transistor (ONSEMI BD679) which should follow signal (IN4), fails to work and turns on inductive load ...
0
votes
1answer
29 views

How do I find the power factor and the equivalent inductivity value for this given scheme?

My exam is in 2 days and I just can't figure this thing out. I have the following scheme: First I was asked to find out the impedance, resistance and reactance of the dipole given below. This is what ...
1
vote
1answer
61 views

Circuit for detecting signal inversion

I am using two inductors on both sides of an ac carrying straight wire and want to detect their proximity from the wire. The coils are a set distance apart and move together laterally via mechanical ...
0
votes
2answers
925 views

Desktop PC power supply is Inductive or resistive loads?

Our daily computers (Desktop PC, Server or normal laptop, mobile chargers) are those power supply inductive or resistive loads?
0
votes
1answer
58 views

Can you pair a compass or magnetometer with an induction circuit to create a form of metal detector?

A compass or magnetometer by themselves can only detect/measure magnetic fields, and thus would normally only be able to detect ferrous metals and (possibly) some active electrical circuits in ...
1
vote
1answer
66 views

How do inductive chargers detect a load?

For a wireless inductive charger, I understand the basic operating principle. I have a question regarding the operation of such chargers when no "load" is "connected". How do they detect the presence ...
0
votes
3answers
81 views

What specifies how much energy can be disspated in an IGBT when switching off?

I am driving an inductive load with an inductance \$L = 500\mu H\$ with a steady-state current of \$I = 300A\$. I would like to switch this current off quickly, and I plan on using an IGBT to do so. ...
0
votes
1answer
222 views

Effects of rapidly pulsing DC inductive load on solid state relays

I'd like to use some solid state relays to turn on and off a high voltage, low current DC inductive circuit (120-150VDC, 20-60ma). The SSR would only be switched on and off at a maximum of once every ...
2
votes
1answer
556 views

Driving inductive load from IC with MOSFET

I am designing a driver circuit to drive a hydraulic proportional valve from an IC's PWM output. (IC is ATmega 2560). The coils on the valve draw approx 3Amps at %100 duty cycle with a power supply of ...
1
vote
1answer
245 views

Triac misfires because of noise from inductive loads

The product is a wifi enabled smart switching device. One device has 4 different channel for four different appliances to be connected to the product. Each channel has a pair of optocoupler and triac ...
0
votes
2answers
900 views

Transistor as a switch, what does the inductor do?

I dont understand what the inductor in this circuit is actually doing. Is there a current flowing through the coil when my input is 0 ? If so, it should be DC so the coil isnt really doing anything ...
0
votes
1answer
133 views

What type of resistor component is this?

I have an RCA Victor 35x tube radio and I need to know what type of resistor this is and what it's purpose is? There is some wire wrapped around the resistor and it's attached to the antenna. ...
0
votes
1answer
69 views

Relay Max Inductive Current

I have a few of these(http://old.ghielectronics.com/downloads/man/20084141716341001RelayX1.pdf) and I was looking at the data sheet. It states that the max inductive load is 7amp(3 on form C). Does ...
0
votes
2answers
162 views

Can an analog inductive proximity sensor be used to discriminate between different types of metal (aluminum and steel)?

I am attempting to create a robot that will sort aluminum from steel automatically via an arduino. The code is essentially: if steel, do X, if aluminum, then do Y. I am using an analog inductive ...
1
vote
1answer
104 views

Short range wireless pulse transmission in wind anemometer

I have an old windmil-type anemometer, something like this: (Illustrative image, the real unit is 40+ year old soviet-made device with presumably no operational active components inside) My project ...
1
vote
1answer
304 views

Can I add flyback diodes to my car window motors?

I have an older car with a known issue with the window switches: they carry all the motor current, and after a while the contacts suffer carbon buildup presumably from flyback arcing. Commonly, owners ...
0
votes
2answers
141 views

Comparison of energy storage density of inductive and capacitive systems

In the paper A Review of Short Pulse Generator Technology by John Mankowski (IEEE Transactions on Plasma Science, Vol. 28, No. 1, 2000, pp 102-108) I found that "energy density of inductive storage ...
2
votes
1answer
372 views

triac controlled voltage preregulator (mains)

At present I am rebuilding an 1990 Elektor powersupply with a triac controlled preregulator able to handle inductive loads. My intention is to modernise the design but first I want it to be ...
0
votes
2answers
163 views

Reducing Inductive Kick when Switching Audio Transformer

I have a circuit where I'm switching the primary of an audio transformer using relay NO/NC contacts. A partial schematic is shown. The problem is that I'm getting inductive kick whenever the ...
1
vote
2answers
193 views

PIC32 intermittent resets - revisited

This is a follow-up on a previous question that I have asked before, after making some changes as suggested through valuable inputs by other members, but with the problem persisting. In a nutshell, ...
0
votes
2answers
549 views

Problem with mosfet in H-bridge

I am using 4 IRF840 N-channel mosfet,converting 325VDC to 230VAC with SPWM and H-bridge.I have no problem with resistive load,but when I connect inductive load or a device with capacitor power supply,...
0
votes
1answer
483 views

NPN driving PNP, Diode from NPN Base to PNP Collector?

I am reviewing some old 12V alarm designs that use the circuit below to activate a siren. The design has been built on PCB and I have confirmed proper operation, proving the schematic is not flawed (...